ipv4: icmp: validate reply type before using icmp_pointers
In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: validate reply type before using icmp_pointers Extended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type. That value is outside the range covered by icmp_pointers[], which only describes the traditional ICMP types up to NR_ICMP_TYPES. Avoid consulting icmp_pointers[] for reply types outside that range, and use array_index_nospec() for the remaining in-range lookup. Normal ICMP replies keep their existing behavior unchanged.
CVE-2026-46037
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46037
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "93df2af4f491de33827550b9d420f01808c0706b",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "92e7c209036dcc0e8ffdf806fdfd3645b263bea5",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "bc64a66e0b9ad937d3d49934242ee62b01ba9a94",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "c2178ff1c70ebfc2ab9651b230c58a34683db759",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1",
"versionType": "git"
},
{
"status": "affected",
"version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
"lessThan": "67bf002a2d7387a6312138210d0bd06e3cf4879b",
"versionType": "git"
}
],
"programFiles": [
"net/ipv4/icmp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.86",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.27",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.4",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv4/icmp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46037
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40107 · Revision 1
- Added to Heist Feed
- Publisher date